According to Vilborg, all four playing card suit names were taken together directly from French - apparently without regard to koro - which comes primarily from Latin.

According to Vilborg, all four playing card suit names were taken together directly from French - apparently without regard to koro - which comes primarily from Latin.

In fact, all four suits correspond to objects that have their own names in Esperanto:

• kero / koro
• trefo / trifolio
• karoo / kahelo
• piko / pikilo